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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed under the Apache License, Version 2.0 (the "License");<a name="line.2"></a>
<FONT color="green">003</FONT>     * you may not use this file except in compliance with the License.<a name="line.3"></a>
<FONT color="green">004</FONT>     * You may obtain a copy of the License at<a name="line.4"></a>
<FONT color="green">005</FONT>     *<a name="line.5"></a>
<FONT color="green">006</FONT>     *     http://www.apache.org/licenses/LICENSE-2.0<a name="line.6"></a>
<FONT color="green">007</FONT>     *<a name="line.7"></a>
<FONT color="green">008</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.8"></a>
<FONT color="green">009</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.9"></a>
<FONT color="green">010</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.10"></a>
<FONT color="green">011</FONT>     * See the License for the specific language governing permissions and<a name="line.11"></a>
<FONT color="green">012</FONT>     * limitations under the License.<a name="line.12"></a>
<FONT color="green">013</FONT>     */<a name="line.13"></a>
<FONT color="green">014</FONT>    package com.googlecode.jsendnsca.encryption;<a name="line.14"></a>
<FONT color="green">015</FONT>    <a name="line.15"></a>
<FONT color="green">016</FONT>    import static javax.crypto.Cipher.*;<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    import java.security.GeneralSecurityException;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    import javax.crypto.Cipher;<a name="line.20"></a>
<FONT color="green">021</FONT>    import javax.crypto.SecretKey;<a name="line.21"></a>
<FONT color="green">022</FONT>    import javax.crypto.spec.IvParameterSpec;<a name="line.22"></a>
<FONT color="green">023</FONT>    import javax.crypto.spec.SecretKeySpec;<a name="line.23"></a>
<FONT color="green">024</FONT>    <a name="line.24"></a>
<FONT color="green">025</FONT>    /**<a name="line.25"></a>
<FONT color="green">026</FONT>     * Triple DES encryption<a name="line.26"></a>
<FONT color="green">027</FONT>     *<a name="line.27"></a>
<FONT color="green">028</FONT>     * @author krisajenkins<a name="line.28"></a>
<FONT color="green">029</FONT>     */<a name="line.29"></a>
<FONT color="green">030</FONT>    public class TripleDESEncryptor implements Encryptor {<a name="line.30"></a>
<FONT color="green">031</FONT>    <a name="line.31"></a>
<FONT color="green">032</FONT>        private static final String DES_ALGORITHM = "DESede";<a name="line.32"></a>
<FONT color="green">033</FONT>        private static final String DES_TRANSFORMATION = "DESede/CFB8/PKCS5Padding";<a name="line.33"></a>
<FONT color="green">034</FONT>    <a name="line.34"></a>
<FONT color="green">035</FONT>        /*<a name="line.35"></a>
<FONT color="green">036</FONT>         * (non-Javadoc)<a name="line.36"></a>
<FONT color="green">037</FONT>         *<a name="line.37"></a>
<FONT color="green">038</FONT>         * @see com.googlecode.jsendnsca.encryption.Encryptor#encrypt(byte[],<a name="line.38"></a>
<FONT color="green">039</FONT>         * byte[], java.lang.String)<a name="line.39"></a>
<FONT color="green">040</FONT>         */<a name="line.40"></a>
<FONT color="green">041</FONT>        public void encrypt(byte[] passiveCheckBytes, byte[] initVector, String password) {<a name="line.41"></a>
<FONT color="green">042</FONT>            final byte[] keyBytes = toFixedSizeByteArray(password.getBytes(), 24);<a name="line.42"></a>
<FONT color="green">043</FONT>            final byte[] initVectorBytes = toFixedSizeByteArray(initVector, 8);<a name="line.43"></a>
<FONT color="green">044</FONT>    <a name="line.44"></a>
<FONT color="green">045</FONT>            final SecretKey key = new SecretKeySpec(keyBytes, DES_ALGORITHM);<a name="line.45"></a>
<FONT color="green">046</FONT>            final IvParameterSpec iv = new IvParameterSpec(initVectorBytes);<a name="line.46"></a>
<FONT color="green">047</FONT>    <a name="line.47"></a>
<FONT color="green">048</FONT>            try {<a name="line.48"></a>
<FONT color="green">049</FONT>                final Cipher cipher = Cipher.getInstance(DES_TRANSFORMATION);<a name="line.49"></a>
<FONT color="green">050</FONT>                cipher.init(ENCRYPT_MODE, key, iv);<a name="line.50"></a>
<FONT color="green">051</FONT>                final byte[] cipherText = cipher.doFinal(passiveCheckBytes);<a name="line.51"></a>
<FONT color="green">052</FONT>    <a name="line.52"></a>
<FONT color="green">053</FONT>                for (int i = 0; i &lt; passiveCheckBytes.length; i++) {<a name="line.53"></a>
<FONT color="green">054</FONT>                    passiveCheckBytes[i] = cipherText[i];<a name="line.54"></a>
<FONT color="green">055</FONT>                }<a name="line.55"></a>
<FONT color="green">056</FONT>            } catch (GeneralSecurityException e) {<a name="line.56"></a>
<FONT color="green">057</FONT>                throw new RuntimeException(e);<a name="line.57"></a>
<FONT color="green">058</FONT>            }<a name="line.58"></a>
<FONT color="green">059</FONT>        }<a name="line.59"></a>
<FONT color="green">060</FONT>    <a name="line.60"></a>
<FONT color="green">061</FONT>        private byte[] toFixedSizeByteArray(byte[] source, int fixedLength) {<a name="line.61"></a>
<FONT color="green">062</FONT>            byte[] result = new byte[fixedLength];<a name="line.62"></a>
<FONT color="green">063</FONT>    <a name="line.63"></a>
<FONT color="green">064</FONT>            for (int i = 0; i &lt; fixedLength &amp;&amp; i &lt; source.length; i++) {<a name="line.64"></a>
<FONT color="green">065</FONT>                if (i &lt; source.length) {<a name="line.65"></a>
<FONT color="green">066</FONT>                    result[i] = source[i];<a name="line.66"></a>
<FONT color="green">067</FONT>                } else {<a name="line.67"></a>
<FONT color="green">068</FONT>                    result[i] = 0;<a name="line.68"></a>
<FONT color="green">069</FONT>                }<a name="line.69"></a>
<FONT color="green">070</FONT>            }<a name="line.70"></a>
<FONT color="green">071</FONT>    <a name="line.71"></a>
<FONT color="green">072</FONT>            return result;<a name="line.72"></a>
<FONT color="green">073</FONT>        }<a name="line.73"></a>
<FONT color="green">074</FONT>    }<a name="line.74"></a>




























































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